Parts for Briggs & Stratton 31C707-0525-B1: Rewind Starter / Motor-Starter Parts

Prevents oil leaks around the crankshaft in small gas engines. Replace if oil seeps from the bottom of the engine. Verify fit with your model number.

Engine won't start or runs rough? A cracked or warped cylinder head disrupts air and fuel flow. This part restores proper engine compression and performance.

This authentic OEM replacement cylinder head gasket fits a variety of different lawn tractors. The cylinder head, or more commonly just “head”, is an integral part of the combustion chamber. The head sits at the top of the cylinders and closes them off to create a chamber. The head usually has openings that connect to the exhaust and airflow. However, it is important that neither air nor exhaust leak in or out of these connections. The head uses several of these gaskets to prevent that from happening. The cylinder head makes up a part of the combustion chamber and, as such, gets very hot. Over a lifetime of use, a cylinder head gasket can overheat and warp. When this happens, it will no longer seal the cylinder head and must be replaced. Replacing a cylinder head gasket requires disassembling much of the engine, so follow the user's manual closely while making this repair. This part is compatible with Toro and Briggs & Stratton lawn tractors and comes sourced from its original manufacturer. This part does not include any additional hardware.

The crankcase is a metal case over the crankshaft of an engine. It is essential to the operation of the engine as it shields the crankshaft and rods from any debris. It also ensures the pressurization of the chamber and helps to keep pistons and oil moving properly. The crankshaft gasket is part of what keeps the seal and allows the engine to function. It can wear with time or even become dry and cracked. It will cause oil leakage, smoke, and even engine failure. This is a genuine OEM crankcase gasket for lawnmowers, lawn tractors, and small engines produced by Toro, Cub Cadet, MTD, Briggs & Stratton, and Simplicity. It comes as an individual component.

This screw is a genuine Midwest Engine part, sold individually. This screw can be used as a replacement part for a variety of small engine outdoor appliances including lawn mowers, snowblowers, and wood chippers. The purpose of a screw in such outdoor appliances is to provide a secure fastening for two or more components to one another through the piercing of the screw into the components and the rotation of the screw so that its placement is stable.The screw of a small engine outdoor appliance is a small component that can be easily lost or misplaced. If the screw is stripped or otherwise damaged, it should be removed and replaced by this genuine OEM replacement part. Remember to always wear gloves when handling, repairing, and operating outdoor equipment. Always unplug the appliance before performing any kind of repair or replacement. This is an OEM part sourced directly from the manufacturer, and it is sold individually. This screw is compatible with the following outdoor appliance brands: Midwest Engine, Briggs & Stratton, Toro, Craftsman, Cub Cadet, Murray, Lawn Boy, MTD, and Simplicity.

Fix oil leaks or perform routine oil changes with this engine oil drain plug. Threads into the oil tank base for secure drainage. Simple DIY repair.

Engine won't restart after hitting an object? A sheared flywheel key is often the cause. This small part keeps the flywheel connected to the crankshaft.

Fix low compression or excessive oil consumption with this engine piston assembly. Restores power and performance to lawn and garden engines.

Piston ring set for small engines. Replace when you notice excessive oil consumption, blue smoke, or loss of compression. Confirm fit with your engine model.

Fix loss of power, hard starting, or excessive smoke with this engine exhaust valve. Controls exhaust release in lawn mowers and small engines.

Engine won't start or runs rough? A faulty intake valve disrupts the air-fuel mixture. This valve controls airflow into the combustion chamber. DIY repair.

This is an exhaust valve designed for use in a lawn mower engine. It controls the release of combustion gases from the engine cylinder, allowing spent exhaust to exit during the exhaust stroke. Replace this valve if the engine has poor performance, loss of compression, excessive exhaust smoke, or difficulty starting.

This is a genuine replacement for the camshaft in select Briggs & Stratton engines. The camshaft is found in the crankcase assembly and is designed to help turn the crankshaft to power the engine. This part helps crank the engine and so it is exposed to constant wear and repetitive motion, which can cause it to deteriorate with regular use. It can also break or become damaged due to impact. Without a properly functioning camshaft, the engine will not be able to function, so a failed part must be replaced. This genuine OEM camshaft is manufactured to specific standards and designed to fit select Briggs & Stratton and Toro equipment that has compatible engines. This camshaft includes the part itself along with two metal tappet valves, and is sold as an individual unit. This part is made of durable metal. Other components are sold separately. Allow the engine to cool completely before performing any repairs and always wear gloves to provide hand protection when working on lawn and garden equipment and engines.

Intake gasket seals the connection between carburetor and engine block. Replace if you notice air leaks, rough idle, or poor performance. Confirm fit with your engine model number.

This genuine OEM replacement intake manifold gasket for a small gas-powered lawn appliance motor acts as a seal between two engine components, like any other gasket. However, the intake manifold gasket is one of the most necessary gaskets because it is responsible for sealing the engine vacuum and coolant. Intake manifold gaskets can be damaged because of their location in the engine. If the engine has been running hot for a while, the metal can expand and crush the gasket, causing it to fail. If this happens, the engine will begin overheating, as coolant can no longer reach the areas where it is needed. Replacing an intake manifold gasket will mean removing the air filter and its housing, the oil drain tube, blower housing, breather tube, and carburetor. Making this repair requires a set of socket wrenches and screwdrivers. This part is compatible with a wide range of mowers, chippers, and blowers from Briggs & Stratton, Toro, Cub Cadet, MTD, Simplicity, and Lawn Boy. It is sourced from the original manufacturer and ships individually.

The flywheel fan is attached to the flywheel and is designed to help circulate air and keep the engine cool during use. This plastic blower fan should run whenever the engine is running to ensure that the equipment doesn’t overheat. The fan may stop working over time due to regular wear or as a result of being damaged. If theflywheel fan isn’t working, the engine could risk overheating, and that could lead to many other issues. Replacing it with this genuine OEM replacement will ensure that the equipment can operate safely and at peak performance. This genuine OEM Flywheel Fan from Briggs & Stratton is designed to fit most lawn equipment engines in the 319000 and 31A000 model families. It is made with exact standards and comes directly from the manufacturer, providing peace of mind that it will always work as it should. This unit is sold individually and contains the flywheel fan and a replacement screen. The bolt required to secure the fan is sold separately.

Mounting screw for lawn and garden engines. Secures engine components and covers. Replace if stripped, corroded, missing, or damaged during maintenance.

This is a small adjustment screw used in lawn mower engines to regulate idle speed. It threads into the carburetor assembly and controls the amount of air or fuel mixture at idle. Replace this screw if it is stripped, corroded, or if the engine idle speed cannot be properly adjusted.

Float hinge pin for lawn and garden engines. Secures the carburetor float assembly. Replace if bent, worn, or missing to restore proper fuel flow regulation.

Engine flooding or not starting? This metal float needle valve regulates fuel flow in your carburetor. Controls gas intake and outflow in the fuel bowl.

Fix rough idle, hard starting, or stalling issues with this carburetor overhaul kit. Includes gaskets, seals, and components to restore fuel delivery.

Fix an engine that won't start or runs rough with this carburetor kit. Includes carburetor body, gasket, fuel hose, clamps, and choke assembly.

This is a carburetor float that is used in a wide variety of lawn and garden equipment. The carburetor float is used in the engine to close and open the float needle valve. The main responsibility of the carburetor float is to open up to allow fuel into the carburetor when drained and to shut off the flow of fuel if the bowl is filled. If the float isn't working properly, the engine may not idle, the carburetor can flood, and the motor may stall while the tool is in use.Before replacing the carburetor float, put on work gloves and disconnect the spark plug wire. The carburetor will need to be removed from the equipment. The carburetor float and any other malfunctioning parts can be taken out and replaced with new components. While working on the parts, the jets can also be cleaned as a maintenance process.This carburetor float is sold as an individual item. It is an authentic OEM replacement part sourced directly from the manufacturer. The float is designed to be used with lawnmowers, lawn tractors, wood chippers, and snowblowers manufactured by Cub Cadet, Briggs & Stratton, MTD, Toro, and Simplicity.

When the fuel in a small, gasoline-powered engine moves up the fuel line, it must be mixed perfectly with air and together burn in just the right mixture and amount in order for engines to function properly. Because too much gas might be coming into the carburetor or because there might be a need for more gasoline than can readily move up the fuel line, the carburetor has a small device called the float bowl. The float bowl has a ready supply of gasoline for use as needed by the carburetor. To keep the gasoline in check while all this is happening, a device called the float bowl gasket keeps all the elements separate. With use and age, sometimes these gaskets crack or grow brittle and must be replaced. This causes air to leak into the mix and the engine will not operate smoothly. Replace this gasket with a genuine OEM replacement part like this one, manufactured to be exactly like the factory original that is being replaced. This part is compatible with engines sold by Toro, Simplicity, MTD, Briggs & Stratton, and Cub Cadet. Part sold individually.

Seals the carburetor float bowl to prevent fuel leaks. Replace if you notice fuel leaking or excessive fuel consumption. Confirm fit with your model.

This genuine Midwest Engine fuel line directs fuel into the carburetor, which creates the mixture of fuel and air that powers the lawn tractor or a lawn mower.Fuel lines are likely to suffer damage as a result of the dirt, debris, pebbles, and gravel that might be flung around in the air and onto the lawn mower or lawn tractor during use. If punctures, tears, rips, warping, or erosion of the part occurs, the fuel lines must be removed and replaced immediately. Operating a lawn mower or lawn tractor without a functional fuel line can impact fuel economy or even cause dangerous fuel leaks. Remember to always wear gloves when handling, repairing, and operating outdoor equipment. This fuel line is compatible with the following brands: Midwest Engine, Briggs & Stratton, Cub Cadet, Simplicity, and Toro. This part is sold individually.

Replace your engine fuel line if you notice fuel leaks, cracking, or hardened hoses. Connects fuel tank to carburetor. Common DIY repair for lawn mowers.

Mower won't start or runs poorly? Cracked or leaking fuel lines prevent proper fuel delivery. Simple 15-minute DIY repair restores engine performance.

This is a replacement rocker arm adjuster that is specifically designed for use in select lawn mower engines. The rocker arm adjuster attaches to the rocker arm, which is responsible for opening and closing the valves on the engine responsible for injecting fuel and air. By doing this, it impacts the horsepower and performance of the engine. Over time, rocker arm adjusters can become lost or damaged. If they are not functional or are missing, the rocker arm will not be able to open and close the valves appropriately and the engine may not function at all. This genuine OEM rocker arm adjuster is manufactured to exact standards for Briggs & Stratton engines and is designed to offer an exact replacement for the part that came with the machine originally. This part can also be used as a replacement on select models from Toro and Lawn Boy, with over 150 machines that can use this rocker arm adjuster in total. The part is made of durable materials and sold as an individual unit. No additional hardware or parts are included. Never perform repairs on a hot engine and always wear gloves for hand safety.

This genuine OEM replacement part is a governor spring for a wide range of appliances, including tillers, generators, snowblowers, and blower vacuums. As its name suggests, this spring is located in the governor. It maintains tension in the governor arm so that when the operator repositions the throttle lever, it engages the governor. The governor then modulates how much fuel the throttle allows into the carburetor, effectively slowing down or speeding up the engine. After repeated use, springs begin to lose some of their tension and wear out. If the governor spring no longer provides as much tension, the governor arm will not move and the throttle will not engage. Without a functioning throttle, the operator will not be able to regulate how quickly the engine runs. Replacing this spring is easiest once the throttle has been disassembled using a nut driver set and a pair of pliers. This replacement governor spring is a high-quality part that matches the exact requirements for Toro and Briggs & Stratton appliances. This part is sourced from its original manufacturer and does not include any additional hardware.

This genuine Midwest Engine valve cap protects the internal workings of the small engine by keeping dirt, debris, pebbles, and any other small material picked up by the appliance out of the engine. The valve cap of a small engine outdoor appliance might have to be replaced if it suffers damage or if it is simply lost or misplaced, which could allow dirt and debris swept up into the air by the appliance to enter the infrastructure of the machinery and cause internal damage. Before more severe damage occurs, it is best to remove and replace the damaged valve cap. This replacement should be done before using the outdoor appliance again, as to not run the risk of further damage. Remember to always wear gloves when handling, repairing, and operating outdoor equipment. This valve cap is compatible with the following brands: Midwest Engine, Briggs & Stratton, Toro, Simplicity, Lawn-Boy, MTD, Craftsman, and Cub Cadet. It can be used as a replacement part for the small engines of outdoor appliances such as lawn tractors, lawn tractors, snowblowers, wood chippers, leaf blowers, tillers, and edgers. This part is sold individually.

Inline fuel filter strains water and debris from fuel before reaching the combustion chamber. Replace if engine runs rough or won't start. Verify fit.

Control wire casing for lawn and garden engines. Protects and guides throttle or choke control cables. Replace if cracked, split, or missing.

Control wire for lawn and garden engines. Connects controls to engine throttle or choke mechanisms. Replace if frayed, broken, kinked, or missing.

Seals carburetor float bowl bolt to prevent fuel leaks on lawn mower engines. Replace during carburetor overhaul for proper seal. Verify fit with model.

Mounting screw for lawn and garden engines. Replaces lost, stripped, or damaged screws used to secure engine components. Essential hardware for assembly.

Replace a faulty magneto armature when your lawn mower engine won't start or runs rough. This ignition coil generates spark to ignite fuel for combustion.

Metal mounting screw for lawn and garden engines. Secures components together throughout the equipment. Replace when stripped, rusted, or missing.

The spark plug helps to start the engine by creating the spark that will cause the fuel to ignite in the engine during combustions. Over time, the spark plugs will become worn down and go bad. Multimeters are typically used to test the spark plugs. However, owners should also regularly look at the spark plugs to search for signs of corrosion that could indicate they are going to go bad. If they are not functioning properly, the engine will not fire and start. They will need to be replaced. This is an OEM replacement part that can be used on a range of small engines and lawn equipment from many brands. Compatible brands include Toro, Briggs & Stratton, Craftsman, Cub Cadet, Simplicity, and Snapper.

Metal washer for lawn and garden engines. Installs between engine components to provide proper spacing and prevent wear. Replace if worn, missing, or damaged.

Fixes charging problems and electrical system issues in lawn and garden engines. Stabilizes voltage output to prevent battery drain and equipment failure.

Replacement screw that secures the pawl friction plate in lawn and garden engines. Replaces lost, stripped, or damaged flange bolts on the recoil assembly.

This is an O-ring seal that can be used in many types of engines for lawn and garden equipment. It is responsible for sealing the connection between the cylinder head assembly and the intake manifold. The sealing process prevents dirt and debris from moving throughout the equipment and getting into the motor. As time passes, the O-ring seal can shrink, causing oil or air leaks and decreasing engine performance.When the O-ring is damaged, clogged, worn, or broken, it will need to be cleaned or replaced before using the lawn equipment again. The damaged or broken O-ring seal can be removed using a flat head screwdriver. After it has been removed, the replacement component can be installed in the same place. Make sure that the O-ring seal is properly seated to avoid additional leaks. Reassemble the parts before using the tool. This is a genuine OEM replacement part that is sourced directly from the manufacturer. It is sold individually. It is used in lawnmowers, lawn tractors, snowblowers, and wood chippers manufactured by Simplicity, MTD, Lawn-Boy, Cub Cadet, Toro, and Briggs & Stratton.

Engine won't start or runs rough? A worn spark plug boot can cause misfires and weak ignition. This boot connects your spark plug to the coil securely.

Small but essential hardware nut for lawn and garden engines. Secures components in place when used with washers and screws. Replace if stripped or worn.

This replacement friction spring is a genuine OEM part meant for any number of small appliance engines run using a starter rope. This spring absorbs large amounts of kinetic energy that could damage the starter rope pulley system. It helps keep the pulley from being overstretched, which would create enough pressure to break the entire system. This spring sits at the center of the pulley system and creates resistance as the user yanks the starter rope. Friction springs can become worn out after repeated use, especially if a user tends to yank the starter rope quite forcefully. The most obvious sign of a worn of friction spring is if the pulley system lacks any resistance. As the user pulls the cord, they should feel a little pull back, but if the friction spring is worn, there will be much less resistance. Replacing this part is straightforward and will only require a screwdriver. Simply open the pulley system, carefully remove the old spring, and install the new one. This part is compatible with a wide number of appliances from Toro, Vanguard, Briggs & Stratton, and Lawnboy. It comes sourced from the original manufacturer and ships individually.

Replacement mounting screw for lawn and garden engines. Secures engine components and covers. Order when original is stripped, missing, or damaged.

Replacement wiring harness for lawn and garden engines. Restores electrical connections when original harness is damaged, frayed, or corroded.

This replacement valve seal is a genuine OEM part for a lawn tractor or mower. The valve stem is a type of valve that transfers oil into the cylinder and then immediately reseals due to the pressure in the chamber. However, if the seal is damaged, it will not close and oil will leak into the cylinder. If this happens, the cylinder head may become overly lubricated and not run well. This seal helps prevent that from happening. It fastens to the intake valve and valve stem keeper. Seals will naturally wear out over time due to stress and exposure to corrosive oxidizing agents in an engine. When this happens, the valve will leak oil. To test if the valve seal is compromised, look for whitish-grey smoke that indicates burning oil and also measure to see how much oil the engine is consuming. If the seal is breached, use a screwdriver and socket wrench set to change out the part. This top of the line replacement valve seal is compatible with Briggs & Stratton, Toro, and Lawn Boy lawn tractors. It is sourced from the original manufacturer and ships individually.

Fix an engine that won't start or cranks slowly with a new starter solenoid. This electrical component transfers battery current to engage the starter.

This oil pump cover is a genuine Midwest Engine part, sold individually. This oil pump cover can be used as a replacement part for lawnmowers, snowblowers, wood chippers, and lawn tractors. It ensures that the oil pump can deliver oil to the engine without any excessive oil leakage. Symptoms of a damaged oil pump cover can include oil leakage in and around the cover, reduced oil pressure, and oil leakage in and around the intake manifold gasket. If any of these symptoms occur and are directly attributable to the oil pump cover, the part should be immediately replaced with this genuine OEM replacement part. Remember to always wear gloves when handling, repairing, and operating outdoor equipment. This is an OEM part sourced directly from the manufacturer, and it is sold individually. This Oil pump cover is compatible with the following outdoor appliance brands: Midwest Engine, Briggs & Stratton, Toro, Simplicity, Cub Cadet, Lawn-Boy, and MTD.

Fix oil leaks from your rocker cover with this valve cover gasket. Creates an air-tight seal between engine and valve cover. Easy DIY replacement part.

This authentic OEM replacement push rod connects to the camshaft on small or medium sized gas-powered lawn tractor engines, and as the camshaft turns, the push rod transfers that motion into the valves. Without a functioning push rod, the valves will not open and the engine will not work. Push rods also act as transferring units that bring oil through the valves and into the camshaft. If these parts start to stick due to poor lubrication, push rods can bend and will no longer work properly. It is also possible, though rare, for a push rod to bend due to general metal fatigue over time. To identify a bent push rod, listen for a ticking sound in the engine and look out for any slipping gears. Accessing the push rods will mean taking apart the camshaft and valves and may require the user's manual. This replacement part is sourced from its original manufacturer and is compatible with Craftsman and Briggs & Stratton lawn tractors. It ships individually.

This rocker arm is a genuine Midwest Engine part. A rocker arm is a vital part of an internal combustion engine that controls the intake and exhaust valves in order to direct power from the engine to the wheels, setting the appliance, such as a lawn tractor, wood-chipper, snowblower, or lawn mower in motion. Natural wear and tear from extended use over a long period of time can cause an internal combustion engine to malfunction or fall into disrepair. The longer a rocker arm is in use without replacement, the more likely it is to be subject to damage. This will require a replacement rocker arm. Signs of weakening infrastructure for which the rocker arm might be responsible can include unexplained clicking noises, stalling engines, lit-up check engine lights, and clear visual signs of deterioration on or around the rocker arm itself. Always wear gloves when handling, repairing, and operating outdoor equipment.This rocker arm replacement part works with engines, lawn tractors, wood chippers, snowblowers, and lawn mowers from brands Briggs and Stratton, Toro, Cub Cadet, Lawn Boy, Craftsman, MTD, and Simplicity.

This push rod guide is designed for use with various lawn and garden equipment motors. It has a construction of plastic and metal that fits into the cylinder head assembly. The purpose of the push rod guide is to secure the push rods and keep them in the proper position. Sometimes these guides can break, become weak, or be covered in residue and need to be replaced.If there are issues with the push rod guide, remove the spark plug before removing the air cleaner assembly, oil fill tube, fuel tank, and blower housing. Any other parts in the way like muffler guards, rewind starters, and carburetors should also be removed. Take the screws off the valve cover and remove them before pressing the spring retainer and spring over a valve. At this point, remove the push rod guide and replace it.This pushrod guide is a genuine OEM replacement part sourced directly from the manufacturer. It comes as a single part. The guide is compatible with lawnmowers, wood chippers, and snowblowers manufactured by Simplicity, Briggs & Stratton, MTD, Craftsman, Lawn-Boy, Toro, and Cub Cadet. A wrench and socket set are useful for making the replacement.

This brush retainer is part of the starter motor on many types of lawn and garden machinery. It comes with both the retainer and a set of four brushes. The main job of the brush retainer is to hold a set of carbon brushes against the commutator bars located on the armature. If the brush retainer is worn, damaged, or improperly seated, it can cause problems with the equipment. The starter motor will not be able to get the proper amount of current from the battery.If the brush retainer might be causing problems, a visual inspection can be performed. A damaged brush retainer can wear down to the wire lead and become burned, pitted, or cracked. When the brush retainer is worn out, it can decrease engine performance, reduce braking, and cause the motor to lose power. This brush retainer is an authentic OEM replacement part sourced directly from the manufacturer. It is sold as an individual part. The retainer is made to be used with lawnmowers, snowblowers, tillers, and wood chippers created by Briggs & Stratton, Craftsman, Toro, Cub Cadet, Lawn-Boy, Snapper, MTD, and Simplicity.

This is a replacement valve gasket set that can be used with a range of different types of lawn and garden equipment that have valves. The gaskets are an important part of these machines. They will help to distribute pressure more evenly while providing an air-tight seal for the valves. This ensures there are no leaks. Gaskets can start to wear down and become brittle the longer they have been used. Some may crack, or they may not fit properly when trying to reassemble parts of the engine. This can cause air to get into the valves. In those cases, it is important to buy quality gaskets as replacements. When making repairs, the owner should make sure they are using the correct gaskets on the right parts in their engine to ensure they work correctly. The valve gasket set is an authentic OEM replacement part. It comes with several different types and sizes of gaskets for use with lawn mowers, snowblowers, and other small engines. The gaskets are compatible with Briggs & Stratton, Toro, Cub Cadet, and Simplicity.

Replacement mounting screw for lawn and garden engines. Secures engine components and housing. Needed when original fastener is stripped, lost, or damaged.

Seals and protects engine connections to prevent oil leaks. Replace when cracked, brittle, or leaking. Verify fit with your engine model number.